Electrical igniting device for internal-combustion engines.



E. GASSMANN. 1m DEVICE FOR ENTERNAL oomsus'nou E APPLICATION FILED AUG. 6, 1913 NGINBS.

ELECTRICAL IGNIT VV/T/VESSES:

B. GASSMANN; me DEVICE FOR INTERNAL COMBUSTION APELIOATION FILED AUG. 6. 1913.

ENGINES.

ELECTRICAL 1mm? Patented Aug. 25, 19M,

2 SBBETSQHEET 2 W/TNfSSfS: 4M4 m UNITED STATIZS PATENT OFFICE.

EUGENEiGAs sMANN, OF BROOKLYN, NEW YORK, ASSIGNOB T0 EISEMANN MAGNETO (10., OF BROOKLYN, NEW YORK, A CORPORATIONOF NEW YORK.

ELECTRICAL IGNITING DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Application filed August 6, 1913.

Patented Aug. 25, 1914. Serial No. 783,341.

T 0 all whom it may concern:

Be it known that I, EUGENE GAHSMANN. a citizen of Germany, and a resident of the borough of Brooklyn, county of Kings, and State of New York, have invented a certain new and useful Improvement in Electrical Igniting Devices for Internal- COmbustion Engines, of which the followin is a complete specification.

Tt is Well known in the art, that in electrical igniting devices for internal combustion engines the point of ignition must be advanced or retarded according to the variations in the speed of the engine, and that such ignition devices are usually equipped with mechanism for effecting this auto matically, the speed of the engine is increased or reduced. This mechanism to be effective, must be constructed so as to be highly sensitive, and prompt to respond to every change in speed.

The mechanism is actuated by variations in the speed of a rotating part of the il'nition device. which, as a rule. is driven by a transmission from the engine. and as the speed of the internal combustion engines, used on automobiles, motor boats. etc., is very much more affected by changes in the load than the speed of other engines, which can be constructed heavier in proportion to the power to be produced, it is, consequently, much more abruptly and frequently reduced and increased, and the operation of the mechanism for advancing or retarding the ignition point. correspondingly of an automobile, motor boat, etc. engine. will be so much more frequent and rapid. The most frequent changes in the speed of these engines, take place at the starting of the engine, and before the vehicle. or boat, gets fairly under Way, and during such periods, the ignition point; regulating devices are kept in a constant state of more or less violent vibration, much more so than when the engine is run at higher speeds than its calculated normal. Furthermore, while the engine runs at such low speeds the rotating of the magneto shaft is influenced by the alternating resistance and attraction of the pole pieces by the field magnets, these alternating factors tending in one instance to retard. and in the other, to accelerate as rotation. This interference is practically nullified when the engine is run at its normal speed or above, while the ignition point regulating device is caused to act most fretpiently during the period from the starting of the engine, and before its normal, or higher, speed is attained, though the economically efficient running of the engine may not, and in most engines does not, require the changing of the ignition point during the period.

The efforts, heretofore made, to obviate the detrimental effect thereof by providing variously constructed cushioning devices, were successful only in reducing the noise, and only for a brief period of time. but are wholly ineffective to remedy the cause and main defect, the vibrating and the con sequent wearing out of the parts of the regulating device, and the impairing, in fact, destroying, of its efficiency. The stated consideratii'ins show that the harm incring and caring, out of the parts of the mechanism, can only be obviated by the prevention of the almost constant changing of the ignition point, ba k and forth, during this period at low speeds, but so that. the capacity of the device for regulating, that is, advancing and retarding of the ignition point. when the engine is run at the higher speeds, is not impaired.

Taking into consideration the fact. that internal comhustion engines of average con struction do not require the ignition point to be advanced during the increase in their speed from zero to nearly the calculated normal. and will work and run satisfacttr rily when making a higher or lower number of revolutions per minute within the stated range. I have devised means for automatically arresting the operating parts of the ignition point regulating device. during the periiids. in which the engine runs at speeds below a predetermined limit, and again automatically releasing them when the speed of the engine rises above it, the arresting, holding, and again releasing of these operatin parts being always effected automatically )y the variations in the speedof the engine. By these means the object of my invention, to relieve the operation of the ignition point regulatin devices of the stated defects, is aecolnplisied.

The practical embodiment of my invention in the construction of an operative device are based upon the stated considera- 'tions anti the construction of the herein shown and described automatic locking attmrhmem fur six-ch 1 1113mm f the:

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the movable part of theregulating devicej the hollow shaft; spiral ridges on the shaft;

e is moved toward the forward end of the, shaft d. The lower faces a of the catches cess 0 to enable block 6 to slide thereunder position. The catches n drop into the recesses 7' when the block 6 reaches its starting position, at the extreme forward end of the recess 0 and lock it, as hereinbefore ex plained.

Extended tests of the device, herein shownand described, in practical use, have demonstrated that a locking device, constructed upon the stated principles, attains the objects of my invention in every respect, and does not, in any way, impair the effectiveness of the device for automatically advancing or retarding the ignition point, wherewith it is combined.

I claim as my invention:

1. The combination With a regulating device, comprising a shaft, rotatably mounted in bearings, means for rotating the shaft; a movable part, and mechanism, actuated by variations in the speed of the rotating shaft, mounted thereon, of means for locking the movable part, thereby suspending the action of the regulating device, and of means, operatively connected with the. locking means, and actuated by an increase in the speed of the rotating shaft, to, or above, a. predetermined limit, and to release the movable part of the regulating device When the said shaft is rotated at, or above, the predetermined speed.

2. The combination with a regulating device, comprising a rotating shaft, a movamounted on, and actuated by variations in the speed of the rotating shaft, of spring actuated means for locking the movable operatable by a predetermined increase .in the speed of the rotating shaft, to release when the said shaft is rotated at, or above, the predetermined speed, substantially as herein shown and described. 1

- 3. The combination- With a regulating defor rotating it; a shaft tu r'nably mounted in a correspondingly grooved sleeve, nonactuated by variations in the speed of the rotating shaft, for reciprocating the sleeve, of a locking device, comprising springand to hold it in fixed position on the shaft; and reversely operatable by a predetermined increase in the speed of the rotating shaft, so as to release the sleeve and hold the lockthe hollow shaft is rotated at, or above, a predetermined speed; substantially as herein shown and described.

4. The combination with a regulating device, comprising a hollow shaft, a shaft, provided with spiral ridges, turnably mounted in the hollow. shaft; a correspondingly grooved sleeve, non-turnably mounted on the shaft; means for rotating the holwoman, and means connected therewith, for reciprocating the sleeve correspondingly to the speed, at which the hollow shaft, is rotated, ofa locking device, comprising recesses springs upon the hollow shaft, and position to engage in the recesses of the sleeve, and means, connected with the bolts, and operatable by centrifugal force at a predeing shaft, for withdrawing the bolts and for holding them withdrawn while the ho low shaft is being rotated at, or above, the predetermined speed; substantially asherein shown and. described.

. 5. The combination with a regulating de- \'ice,'comprising, inter alia, a hollow shaft a. shaft, provided with spiral ridges, turnspondingly grooved sleeve-, non-turnably mounted on the shaft andmeans for reciprocating the sleeve, of a locking device, comprising; recesses in the sleeve, springs secured tojthe-jhollow shaft, and weighted bolts,-adapted to engage the recesses in the sleeve, secured to the springs; substantially as herein'shoyvn and described.

, EUGENE. GASSMANN, Witnesses: A; PIPER,

,Vnnomca BRAUN.

actuated means adapted to engage the sleeve ably mounted in the. hollow shaft; :1 corre- I turnahly mounted on the shaft, and means,

ing means from engaging the sleeve when i in, the sleeve, bolts mounted on termi-n'edincrease in the speed of the rotat- 

